Description
fs/ext4/extents.c in the Linux kernel through 5.1.2 does not zero out the unused memory region in the extent tree block, which might allow local users to obtain sensitive information by reading uninitialized data in the filesystem.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 4.19.37-4 | — |
| Debian 13 | linux | 4.19.37-4 | — |
| Debian 12 | linux | 4.19.37-4 | — |
| Debian 9 | linux | 4.9.168-1+deb9u3 | DSA-4465-1 |
| Debian 8 | linux | 3.16.68-2 | DLA-1823-1 |
| Debian 8 | linux-4.9 | 4.9.168-1+deb9u3~deb8u1 | DLA-1824-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +2 | No fix yet | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-55.60 | USN-4068-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1047.49 | USN-4118-1, USN-4068-1 |
| Ubuntu 18.04 LTS | linux-azure | 4.18.0-1025.27~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +1 | 4.15.0-1037.39 | USN-4068-1 |
| Ubuntu 18.04 LTS | linux-hwe | 5.0.0-23.24~18.04.1 | USN-4069-2 |
| Ubuntu 18.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1039.39 | USN-4068-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1050.57 | — |
| Ubuntu 18.04 LTS | linux-oem-osp1 | 5.0.0-1015.16 | — |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1018.20 | USN-4068-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1041.44 | USN-4068-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1058.64 | USN-4068-1 |
| Ubuntu 16.04 LTS | linux | 4.4.0-157.185 | USN-4076-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1090.101 | USN-4076-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1047.49~16.04.1 | USN-4118-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1051.56 | — |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1037.39~16.04.1 | USN-4068-2 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-55.60~16.04.2 | USN-4068-2 |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1052.59 | USN-4076-1 |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1018.20~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1117.126 | USN-4076-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1121.127 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 18.04 LTS | linux-aws-fips +2 | No fix yet | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2018.18 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2006.7 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1015.20 | — |
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1054.58 | USN-4095-2 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1059.64~14.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-164.192~14.04.1 | USN-4095-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-147.rt24.93.el8 | RHSA-2019:3309 |
| RHEL 8 | perf +26 | 4.18.0-147.el8 | RHSA-2019:3517 |
| RHEL 7 | kernel-rt +10 | 3.10.0-1062.rt56.1022.el7 | RHSA-2019:2043 |
| RHEL 7 | perf +18 | 3.10.0-1062.el7 | RHSA-2019:2029 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.4.1 | SUSE-SU-2019:1550-1 |
| SLES 15 | kernel-azure +2 | 4.12.14-5.30.1 | SUSE-SU-2019:1535-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150.22.1 | SUSE-SU-2019:1529-1 |
| SLES 12 SP4 | kernel-azure +2 | 4.12.14-6.15.2 | SUSE-SU-2019:1536-1 |
| SLES 12 SP4 | kernel-docs +4 | 4.12.14-95.19.1 | SUSE-SU-2019:1530-1 |
| SLES 12 SP3 | kernel-azure +2 | 4.4.180-4.31.1 | SUSE-SU-2019:1527-1 |
| SLES 12 SP3 | kernel-docs +4 | 4.4.180-94.97.1 | SUSE-SU-2019:1532-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.114.1 | SUSE-SU-2019:1534-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_30 | 1-3.5.1 | SUSE-SU-2019:1534-1 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | kernel-xen +3 | 3.12.74-60.64.115.1 | SUSE-SU-2019:1533-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_34 | 1-2.5.1 | SUSE-SU-2019:1533-1 |
| SLES 12 | kernel-ec2 +4 | 3.12.61-52.154.1 | SUSE-SU-2019:1692-1, SUSE-SU-2019:1533-1 |
| SLES 12 | kgraft-patch-SLE12_Update_40 | 1-1.5.1 | SUSE-SU-2019:1692-1 |
| SLES for SAP 12 SP4 | kernel-azure +2 | 4.12.14-6.15.2 | SUSE-SU-2019:1536-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.19.1 | SUSE-SU-2019:1530-1 |
| SLES for SAP 12 SP3 | kernel-azure +2 | 4.4.180-4.31.1 | SUSE-SU-2019:1527-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.97.1 | SUSE-SU-2019:1532-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.114.1 | SUSE-SU-2019:1534-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_30 | 1-3.5.1 | SUSE-SU-2019:1534-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.74-60.64.115.1 | SUSE-SU-2019:1533-1 |
| SLES for SAP 12 SP1 | kgraft-patch-SLE12-SP1_Update_34 | 1-2.5.1 | SUSE-SU-2019:1533-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.4.1 | SUSE-SU-2019:1550-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_1 | 1-3.3.1 | SUSE-SU-2019:1550-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.22.1 | SUSE-SU-2019:1529-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_11 | 1-1.5.1 | SUSE-SU-2019:1529-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_5 | 1-6.3.1 | SUSE-SU-2019:1530-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_26 | 1-4.3.3 | SUSE-SU-2019:1532-1 |
| SUSE Real Time Module 15 SP1 | kernel-rt +3 | 4.12.14-14.8.1 | SUSE-SU-2019:2430-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.114.1 | SUSE-SU-2019:1534-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_30 | 1-3.5.1 | SUSE-SU-2019:1534-1 |
| SUSE Enterprise Storage 4 | kernel-syms +2 | 4.4.121-92.114.1 | SUSE-SU-2019:1534-1 |
| SUSE Enterprise Storage 4 | kgraft-patch-SLE12-SP2_Update_30 | 1-3.5.1 | SUSE-SU-2019:1534-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | kernel-docs +8 | 4.12.14-lp151.28.4.1 | openSUSE-SU-2019:1479-1 |
| openSUSE Leap 15.0 | kernel-docs +8 | 4.12.14-lp150.12.64.1 | openSUSE-SU-2019:1579-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | perf +8 | 4.14.121-109.96.amzn2 | ALAS2-2019-1214 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-147.el8 | ELSA-2019-3517 |
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.29.3.el7uek | ELSA-2019-4746, ELSA-2019-4729 |
| Oracle Linux 7 | kernel-uek-tools +3 | 4.14.35-1902.4.8.el7uek | ELSA-2019-4746 |
| Oracle Linux 7 | perf +12 | 3.10.0-1062.el7 | ELSA-2019-4746, ELSA-2019-2029 |
Advisories 31
- USN-4068-1 linux, linux-aws, linux-gcp, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-4069-2 linux-hwe vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-4118-1 linux-aws vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-4068-2 linux-hwe, linux-gcp vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-4076-1 linux, linux-aws, linux-kvm, linux-raspi2 vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- RHSA-2019:3517 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2019:2043 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2019:2029 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2019:3309 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-4095-2 linux-lts-xenial, linux-aws vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- DSA-4465-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1824-1 linux-4.9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1823-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2019:1534-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1536-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1532-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1535-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1527-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1479-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1579-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1550-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1692-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1529-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2430-1 Security update for kernel-source-rt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1530-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1533-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2019-3517 Important: kernel security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 14, 2019
- ELSA-2019-4746 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 15, 2019
- ELSA-2019-2029 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 13, 2019
- ELSA-2019-4729 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 29, 2019
- ALAS2-2019-1214 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jul 22, 2019
References
- https://github.com/torvalds/linux/commit/592acbf16821288ecdc4192c47e3774a4c48bb64
- 108372 vdb-entry
- openSUSE-SU-2019:1479 vendor-advisory
- FEDORA-2019-48b34fc991 vendor-advisory
- DSA-4465 vendor-advisory
- [debian-lts-announce] 20190617 [SECURITY] [DLA 1823-1] linux security update mailing-list
- [debian-lts-announce] 20190618 [SECURITY] [DLA 1824-1] linux-4.9 security update mailing-list
- openSUSE-SU-2019:1570 vendor-advisory
- 20190618 [SECURITY] [DSA 4465-1] linux security update mailing-list
- openSUSE-SU-2019:1579 vendor-advisory
- USN-4068-1 vendor-advisory
- USN-4068-2 vendor-advisory
- USN-4069-1 vendor-advisory
- USN-4076-1 vendor-advisory
- USN-4069-2 vendor-advisory
- RHSA-2019:2043 vendor-advisory
- RHSA-2019:2029 vendor-advisory
- USN-4095-2 vendor-advisory
- USN-4118-1 vendor-advisory
- http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
- RHSA-2019:3309 vendor-advisory
- RHSA-2019:3517 vendor-advisory